An international court of arbitration invalidated about $12 billion of Kazakhstan’s claims against the oil majors for disputed costs at the Kashagan field, according to people familiar with the matter cited by Bloomberg. The tribunal decided the government filed its case too late for costs incurred between 2011 and 2015. Kazakhstan had been seeking to recoup about $20 billion of disputed costs at the field, which came into production years late and well over budget, and about $8 billion of its claims were allowed to proceed.
Tribunal invalidates $12 billion of Kazakhstan's Kashagan cost claims
An international arbitration tribunal has invalidated about $12 billion of Kazakhstan's claims against the oil majors over disputed costs at the Kashagan field, ruling the government filed too late on costs incurred between 2011 and 2015, Bloomberg reported.
Why it matters: Kazakhstan was seeking to recoup about $20 billion of disputed Kashagan costs, so the ruling removes most of the claim on timing grounds and leaves about $8 billion still in dispute, in a case the majors have cited while pausing new investment in the country.
Data as of Bloomberg report of October 22, 2026 (06:37 ET), read in its publicly visible portion; the ruling itself is private, Bloomberg's sourcing is unnamed people familiar with the matter, and the full article sits behind a paywall, so party statements, any appeal position and the tribunal's reasoning beyond the timing ground are unverified. Single source. Developing item.
Sources
- Kashagan Arbitration Court Invalidates $12 Billion of Cost Claim - Bloomberg - 2026-10-22